i have cast my first few mask and im noticing on my 2nd pull they are more difficult to pull then my first, is there something that will work as a mold release on the self at walmart. i dont really want to have to buy it online but if i do who has it cheap!! thanks for the help guys!!

Any mold release will inhibit the absorption of the liquid and keep the latex from getting any thicker than a very thin skin. Because any plaster is absorbent, there will always be a little pullback when demolding, especially if there is a lot of texture. It's normal.

If you use a release agent, the molds and the pieces pulled from those molds will be a better quality and last longer, that is why they make it.
Does your piece have a white dust on the surface when you pull it? That white color is the surface of you mold.

Slush latex it more forgiving. It is great for first timers.

Try your technique in ANY with any other medium and your pieces will not look as good as the sculpture, if you can get them out. Also your molds life will be GREATLY decreased. Who wants to re-sculpt?

I rather pull a thousand pieces from one mold then one piece from a thousands molds.